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#1
08-07-2008, 08:04 AM
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The Big and small of it...
Well, there is no thread for motor collecting on YORF, so I figured this should go here....
I brought a stash of vintage motors to my local section meeting last night (ASTRE #471) and did some show and tell, and some trading. I managed to pick up both the largest and smallest BP motors of my collection:
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#2
08-07-2008, 08:09 AM
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Ok, nice picture, but what are they?!
 i.e. manufacturer
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Scott D. Hansen Ye Olde Rocket Shoppe - Your One Stop BAR Shoppe! Ye Olde Rocket Plans - OOP Rocket Plans From 38 Companies! Ye Olde Rocket Forum WOOSH NAR Section #558
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#3
08-07-2008, 08:24 AM
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Sorry, I am at work and received a call before I could finish the second post.....
The big motor is a 1991 Rocketflite F50-5. It is 38mm in diameter and 7 inches long. The little guy is a 1976 AVI 1/8A1.9 SP. It is 8.75mm in diameter and 12mm long. As per the AVI catalog, this motor was to be used for stage seperation!! And yes.... the AVI 1/8A fits inside the nozzle opening of the F50....  More details are here: http://www.oldrocketplans.com/pubs/...6/avi1976-2.pdf Motor collecting is fun!! Phred
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#4
08-07-2008, 09:31 AM
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phred:
Is that Rocketflite F50m casing PVC plastic? terry dean
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"Old Rocketeer's don't die; they just go OOP".....unless you 3D print them.
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#6
08-07-2008, 10:37 AM
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ahhh okay the photo makes it look like white plastic to me. This must be one of the eariler Rocketflite motors, as it doesn't appear to have the aluminum casing or the fluorescent labels?
How about a front on nozzle shot with an ruler? terry dean
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"Old Rocketeer's don't die; they just go OOP".....unless you 3D print them.
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#7
08-07-2008, 10:45 AM
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I was told thatthis was a special run of F50s done up for a few people. That is why it has no official label. I am not sure why there is no aluminum tube.
Phred
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#8
08-07-2008, 11:19 AM
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Quote:
I don't think they started using the aluminum tube till the middle of '91. First time I saw one with the liner was at Danville Fall '91. The first Rocketflite motors I saw were in Monroe, GA in 1989. 38mm H motors. A couple worked, one didn't (Big Excitement!). oh, and the casings looked like they were made from cheap paper, like carpet roll cores.
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Roy nar12605
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#9
08-07-2008, 12:19 PM
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This motor is dated Jan 1991, so it may be pre-aluminum tube.
The guy I got this motor from actually launched a rocket with an F50-5 at our last NAR sanctiond old motor launch. The motor performed well, but is spit out at ejection, which was not fun. The empty casing is heavy and came down like a brick. Ph
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#10
08-07-2008, 01:14 PM
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I bet that the "flying brick" ejected case was a real riot to dodge at the launch.
Probably was worse than an old FSI F100 or F7 casing being ejected. Back in the late 70's I saw a giant version of an Astron Invader launched on an F7 that actually intentionally ejected the F7 at Apogee before semi-gliding down. Totally idiotic to intentionally eject an object this large with no recovery system. The F7-4 powr-ejected down like a rock. Needless to say, after one semi-flight the "rangemaster" (they didn't really have RSO's at the launches in my hometown back then) declined to allow the second flight the owner proposed.
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When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !
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